The precision of the method was studied by performing
repeatability experiments. The respective data are shown in
Table 3. It was observed that repeatability, expressed as RSD, for
all analytes was 610.9% for each spiking level and each matrix.
These values are lower than the acceptable limits of 20% for spiking
levels between 0.01 and 0.1 lg/g, and 15% from 0.1 to 1.0 lg/g
(EC, 2002). These results indicate stability of the proposed method.
The data obtained from the recovery studies demonstrated that the